| Abbreviation | Definition |
|---|---|
| BR | basal respiration |
| BR | baseline recovery |
| BR | bedside rounds |
| BR | bilirubin |
| BR | biliverdin reductase |
| BR | binocular rivalry |
| BR | biochemical response |
| BR | biological response |
| BR | birefringence |
| BR | birthing room |
| BR | blink response |
| BR | blocking reaction |
| BR | bombesin receptor |
| BR | bone resorption |
| BR | brachioradialis |
| BR | breast reconstruction |
| BR | breast reduction |
| BR | breathing rate |
| BR | breathing reserve |
| BR | British |